Show rendered md by default (#3594)

* Show rendered md by default

* Lint fix

* chore(file-viewer): remove dead PREVIEW_ONLY_EXTENSIONS export

Co-authored-by: Theodore Li <TheodoreSpeaks@users.noreply.github.com>

* Fix new file logic to default to text

---------

Co-authored-by: Theodore Li <theo@sim.ai>
Co-authored-by: Cursor Agent <cursoragent@cursor.com>
Co-authored-by: Theodore Li <TheodoreSpeaks@users.noreply.github.com>

apps/sim/app/workspace/[workspaceId]/files/components/file-viewer/file-viewer.tsx

@@ -98,7 +98,7 @@ export function FileViewer({
         file={file}
         workspaceId={workspaceId}
         canEdit={canEdit}
-        previewMode={previewMode ?? (showPreview ? 'split' : 'editor')}
+        previewMode={previewMode ?? (showPreview ? 'preview' : 'editor')}
         autoFocus={autoFocus}
         onDirtyChange={onDirtyChange}
         onSaveStatusChange={onSaveStatusChange}

apps/sim/app/workspace/[workspaceId]/files/components/file-viewer/index.ts

@@ -1,3 +1,3 @@
 export type { PreviewMode } from './file-viewer'
 export { FileViewer, isPreviewable, isTextEditable } from './file-viewer'
-export { PREVIEW_ONLY_EXTENSIONS, RICH_PREVIEWABLE_EXTENSIONS } from './preview-panel'
+export { RICH_PREVIEWABLE_EXTENSIONS } from './preview-panel'

apps/sim/app/workspace/[workspaceId]/files/components/file-viewer/preview-panel.tsx

@@ -23,9 +23,6 @@ const PREVIEWABLE_EXTENSIONS: Record<string, PreviewType> = {
   svg: 'svg',
 }
 
-/** Extensions that should default to rendered preview (no raw editor). */
-export const PREVIEW_ONLY_EXTENSIONS = new Set(['html', 'htm', 'svg'])
-
 /** All extensions that have a rich preview renderer. */
 export const RICH_PREVIEWABLE_EXTENSIONS = new Set(Object.keys(PREVIEWABLE_EXTENSIONS))
 

apps/sim/app/workspace/[workspaceId]/files/files.tsx

@@ -476,10 +476,11 @@ export function Files() {
   }, [closeListContextMenu])
 
   useEffect(() => {
-    if (justCreatedFileIdRef.current && selectedFileId !== justCreatedFileIdRef.current) {
+    const isJustCreated = selectedFileId != null && justCreatedFileIdRef.current === selectedFileId
+    if (justCreatedFileIdRef.current && !isJustCreated) {
       justCreatedFileIdRef.current = null
     }
-    setShowPreview(true)
+    setShowPreview(!isJustCreated)
   }, [selectedFileId])
 
   useEffect(() => {
@@ -521,8 +522,8 @@ export function Files() {
       ...(canPreview
         ? [
             {
-              label: showPreview ? 'Hide Preview' : 'Preview',
-              icon: Eye,
+              label: showPreview ? 'Edit' : 'Preview',
+              icon: showPreview ? Pencil : Eye,
               onClick: handleTogglePreview,
             },
           ]

apps/sim/app/workspace/[workspaceId]/home/components/mothership-view/components/resource-tabs/resource-tabs.tsx

@@ -8,7 +8,7 @@ import {
   useState,
 } from 'react'
 import { Button, Tooltip } from '@/components/emcn'
-import { Columns3, Eye, PanelLeft, Rows3 } from '@/components/emcn/icons'
+import { Columns3, Eye, PanelLeft, Pencil } from '@/components/emcn/icons'
 import { cn } from '@/lib/core/utils/cn'
 import type { PreviewMode } from '@/app/workspace/[workspaceId]/files/components/file-viewer'
 import { AddResourceDropdown } from '@/app/workspace/[workspaceId]/home/components/mothership-view/components/add-resource-dropdown'
@@ -36,9 +36,9 @@ const EDGE_ZONE = 40
 const SCROLL_SPEED = 8
 
 const PREVIEW_MODE_ICONS = {
-  editor: Rows3,
-  split: Columns3,
-  preview: Eye,
+  editor: Columns3,
+  split: Eye,
+  preview: Pencil,
 } satisfies Record<PreviewMode, (props: ComponentProps<typeof Eye>) => ReactNode>
 
 /**

apps/sim/app/workspace/[workspaceId]/home/components/mothership-view/mothership-view.tsx

@@ -4,10 +4,7 @@ import { memo, useCallback, useEffect, useState } from 'react'
 import { cn } from '@/lib/core/utils/cn'
 import { getFileExtension } from '@/lib/uploads/utils/file-utils'
 import type { PreviewMode } from '@/app/workspace/[workspaceId]/files/components/file-viewer'
-import {
-  PREVIEW_ONLY_EXTENSIONS,
-  RICH_PREVIEWABLE_EXTENSIONS,
-} from '@/app/workspace/[workspaceId]/files/components/file-viewer'
+import { RICH_PREVIEWABLE_EXTENSIONS } from '@/app/workspace/[workspaceId]/files/components/file-viewer'
 import type {
   MothershipResource,
   MothershipResourceType,
@@ -49,12 +46,11 @@ export const MothershipView = memo(function MothershipView({
 }: MothershipViewProps) {
   const active = resources.find((r) => r.id === activeResourceId) ?? resources[0] ?? null
 
-  const [previewMode, setPreviewMode] = useState<PreviewMode>('split')
+  const [previewMode, setPreviewMode] = useState<PreviewMode>('preview')
   const handleCyclePreview = useCallback(() => setPreviewMode((m) => PREVIEW_CYCLE[m]), [])
 
   useEffect(() => {
-    const ext = active?.type === 'file' ? getFileExtension(active.title) : ''
-    setPreviewMode(PREVIEW_ONLY_EXTENSIONS.has(ext) ? 'preview' : 'split')
+    setPreviewMode('preview')
   }, [active?.id])
 
   const isActivePreviewable =